1. The assembly of the gas cylinder and the torque detection of the supplier's incoming parts are over the upper limit. <br>2. There are paint slag and welding slag in the welding joint of the water storage valve of the air storage cylinder. <br>3. The threaded buckle of the welded joint is unqualified, and it needs to be rectified with a tap. After the rectification, the joint's tightness is destroyed, and there is iron filings at the interface, which affects the tightness.
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